Airvian Linear Slot Diffuser
40x8 Linear Slot Diffuser – 4 Slots
Designed for a 40 × 8 in duct opening, this 4-slot aluminum linear slot diffuser is rated at 672 CFM at 550 FPM. Listed for ceiling, wall and floor applications.
- Neck size
- 39 7/8 in × 7 7/8 in
- Visible face
- 42 1/8 in × 9 9/16 in
- Airflow
- 672 CFM
- Slots
- 4 slots
- Material
- Aluminum
- Applications
- Ceiling, Wall, Floor
Airflow control: Adjustable internal airflow wings
Product Details
Designed for a 40 × 8 in duct opening.
The diffuser uses 4 1 in-wide slots. Built from aluminum.
Rated airflow is 672 CFM at an effective velocity of 550 FPM.
Applications: Ceiling, Wall, Floor.
Airflow control: Adjustable internal airflow wings.
Full Specifications
| Slots | 4 |
|---|---|
| Length | 40 in |
| Slot Width | 1 in |
| Nominal Duct Opening | 40 × 8 in |
| Neck Width | 7 7/8 in |
| Neck Length | 39 7/8 in |
| Face Width | 9 9/16 in |
| Face Length | 42 1/8 in |
| Airflow | 672 CFM |
| Effective Velocity | 550 FPM |
| Material | Aluminum |
| Applications | Ceiling, Wall, Floor |
| Airflow Control | Adjustable internal airflow wings |
Measure the duct opening, not the old vent face
- Measure the inside opening. Measure from inside edge to inside edge in both directions.
- Match the duct opening size. This product is listed for a 40 × 8 in duct opening.
- Check installation dimensions. Neck: 39 7/8 in × 7 7/8 in. Visible face: 42 1/8 in × 9 9/16 in.
Sizing & Performance
40 × 8 linear slot diffuser questions
What duct opening does this diffuser fit?+
This model is sized for a 40 × 8 in duct opening. Measure the inside opening rather than the outside dimensions of the existing vent face.
Is 40 × 8 the same as 8 × 40?+
Yes. Both describe the same rectangular duct opening. Airvian lists the longer dimension first, so both searches resolve to the same 40 × 8 product.
What are the neck and visible face dimensions?+
The neck measures 39 7/8 in × 7 7/8 in. The visible face measures 42 1/8 in × 9 9/16 in.
What airflow is listed for this diffuser?+
Rated airflow is 672 CFM at an effective velocity of 550 FPM.
Where can this linear slot diffuser be installed?+
The listed applications are Ceiling, Wall, Floor. Confirm that the surrounding construction, support and HVAC design are suitable for the installation.
